2026 Sinkankas Symposium: Gems and Minerals of Burma (Myanmar)
The date and topic of the 2026 Sinkankas Symposium is announced.
Fuchsite-Bearing Dolomite Aggregate as a New Jadeite Imitation
A snuff bottle submitted to TULAB as jadeite jade is identified as a dolomite aggregate with fuchsite.
Blooming Bouquet: Thin Films in Russian Emerald
Colorful thin film inclusions are captured within a Russian emerald carving.
Mannardite in Quartz
Fibrous mannardite crystals are observed in three colorless quartz samples.
Fingerprint Pattern on a “Hammered” Pearl’s Surface
Spiral patterns of nacre platelets observed on the surface of a non-bead cultured pearl are reminiscent of fingerprints.
Intriguing Sapphire from Montana, a New Source of Emerald in Central China, and Arkansas Turquoise
Cat’s-Eye Boulder Opal
A precious cat’s-eye boulder opal from Australia is examined in the Carlsbad laboratory.
An Evaluation of Turquoise from the Mona Lisa Mine in Arkansas
Examines samples of Mona Lisa turquoise to identify their chemistry and structure, revealing copper as a major elemental component of the material.
Al Gilbertson Receives Robert M. Shipley Award
GIA’s Al Gilbertson receives the American Gem Society’s highest honor.
New Edition of Tillander’s Diamond Cuts in Historic Jewellery 1381–1910
An updated edition of Herbert Tillander’s book is now available.
Susan Jacques Receives Richard T. Liddicoat Award for Distinguished Achievement
GIA’s president and CEO Susan Jacques is honored with the Richard T. Liddicoat Award for Distinguished Achievement.
Characterization of Emeralds from Zhen’an County in Shaanxi, China
Presents a comprehensive analysis of the gemological, spectroscopic, and trace element characteristics of a set of Shaanxi emerald samples based on standard and advanced gemological methods.
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